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UNITED srargasrgnnr OFFICE.

HENRY L. NICHOLS, OF NEW' YORK, Y.

SLIVERING-IHACHINE.

Specification of Letters latent No. 30,418, dated October 16, 1860.

To all whom it may concern:

Be it known that I, HENRY L. NICHOLS, of the city, county, and State ofNew York, have invented certain new and useful Improvenients inSlivering Machinery; and I do hereby declare that the following is afull, clear, and eXact description thereof, reference being had to theaccompanying drawings making a part of this specification, in which-Figure l is a top view of the improved machine. Fig. 2 is a longitudinalsection taken in a vertical plane through the middle Fig. 3 is atransverse section through Figs. l and 2 in the vertical plane indicatedby the red lines oc, x, showing the vertical slivering cutters. Fig. 4is a view intended to represent the cut of the slivering knives.

Similar letters of reference indicate corresponding parts in the fouriigures.

This invention is an improvement in machinery for slivering blocks ofwood for up holsterers purposes-stuing mattresses, etc. The improvementsconsist in setting the beveled cutting point of each slittingcutter atan obtuse angle, more or less, with its shank, s0 that instead of theircutting perpendicularly into the wood they will make a slanting cut, sothat when two sets of such slivers are used with their points inclinedin opposite directions they will produce, with the horizontal planeirons, prismatic shreds or slivers as will be hereinafter described.

The invention also consists in securing the slivering cutters in stockswhich are allowed to have a lateral play so that the points of theseslivers will follow the grain of the wood where it is not perfectlystraight, as will be hereinafter described.

To enable those skilled in the art to fully understand my invention Iwill proceed to describe its construction and operation.

A, is a bed plate into which the stock B, carrying the slivering cuttersis secured; and C is a frame in which the blocks or bolts D, are securedby set screws, or clamps of any suitable description, which are capableof securing blocks of various lengths in the frame. This frame with theblocks placed in it is represented in the drawings as being held down tothe work by a helical spring ct, which spring surrounds a rod a', thatis jointed to the top of the frame and plays through a rock shaft ZJ,which has its bearings in the tops of the two side guides E, E, of theframe C, which guides are bolted to each side of the bed piece A.

The frame C receives an alternate rectilinear motion from an eccentricor crank wheel, through the medium of jointed connecting rod A2. Themachine may be operated by any prime motor. This frame C, is rectangularand has a bridge passing longitudinally through it with shaftconnections on each end for attachinganother similar frame behind it, ifdesirable. The cutter stock carries two sets of knives c, d, o, d', soarranged with reference to the movement of frame C, which is operated bythe crank or eccentric, that the cutters will act upon the blocks ateach movement of the frame C. The horizontal plane cutters ol, oZ, forthis purpose, are secured in their stock at opposite angles to eachother, so that when the frame is moving forward cl, will cut, and whenthe frame is moved backward d, will cut. In front or opposite thecutting edge of each plane cutter are arranged the slitting or sliveringcutters, which are intended for making ne slits in the blocks, inadvance of the cutters d, d', for the purpose of reducing the shavingsto fine prismoidal strips as represented in the cross section Fig. 4. Inorder to give this shape to the slivers or strips the cutting ends ofthe knives o, c', are inclined from the perpendicular line of theirshanks as represented in Fig. 3, and each set of knives are arranged sothat their cutting points incline in opposite directions, as shown inFig. l, the cutting points c, incline to the right and the points c',incline to the left or vice versa. These points project above thesurface of the bed plate A a suficient distance to cut into the blocksthe thickness of two shavings, and the first movement of the frame C,cuts oif strips which have been acted upon by one set of the cutters,the first cutwill therefore make coarse strips, but all succeeding cutswill make the fine prismoidal strips, for at the second movement of theframe C, the knives c, will cut diagonally across the previous cut ofknives c', while the strips are being planed off by the irons d, d',they pass out through the throats 9, 9, and are raked away for use.

An advantage is gainedy by the arrangement of two sets of cutters forbesides being enabled to produce better stuf, time is saved in theoperation and the machine is made to run with a uniform motion.

The slitting cutters c, 0', are simply narrow and their strips of steelwith their sharp points bent over as above described. These pieces areconfined in gangs within the metal frames 7L, the ends of which areacted upon by springs of a suitable character for the purpose ofallowing the frames with their cutters to move to the right or to theleft. This lateral movement of the cutters c, c', will allow them tofollow the course of the grain of the wood, and thus there need not beso much care taken in the selection of wood with a perfectly straightgrain.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent isl. The slanting pointed cutters c, c', whenthey are arranged in the relation to the two plane irons d, d, andoperate in the manner herein described.

2. Allowing a lateral yielding motion to slitting cutters c, 0, for thepurpose, and substantially herein set forth.

HENRY L. NICHOLS.

Witnesses:

L; W. BENDR, M. M. LIVINGSTON.

